參數(shù)資料
型號(hào)： LC75700T-MPB-E
廠商： ON Semiconductor
文件頁(yè)數(shù)： 6/16頁(yè)
文件大小： 0K
描述： IC KEY SCANNING LSI 20TSSOP
標(biāo)準(zhǔn)包裝： 70
系列： *
Notes on the controller key data read techniques
1. Timer based key data acquisition
(1) Flowchart
(2) Timing chart
No. 7632-14/16
LC75700T
Key data read
processing
YES
NO
DO = "L"
CE = "L"
t3: Key scan execution time when the key data agreed for two key scans (615T (s))
t4: Key scan execution time when the key data did not agree for two key scans and
the key scan was executed again. (1230T(s))
t5: Key address (63H) transfer time
t6: Key data read time
T=
1
fosc
Controller
determination
(Key on)
Key data read request
Key data read
DO
DI
CE
Key on
Key
address
Key scan
Key input
t7
t3
t4
t6
t5
t3
t6
t5
Controller
determination
(Key on)
Controller
determination
(Key off)
Controller
determination
(Key on)
Controller
determination
(Key off)
(3) Explanation
In this technique, the controller uses a timer to determine key on/off states and read the key data. The controller must
check the DO state when CE is low every t7 period without fail. If DO is low, the controller recognizes that a key has
been pressed and executed the key data read operation.
The period t7 in this technique must satisfy the following condition.
t7 > t4 + t5 + t6
If a keydata read operation is executed when DO is high, the read key data (KD1 to KD30) will be invalid.
相關(guān)PDF資料
PDF描述
LC87F2932AU-CD-E IC MCU 8BIT 32K FLASH 64TQLP
LFECP33E-4FN672I IC FPGA 32.8KLUTS 672FPBGA
LFX200B-05FN256C IC FPGA 200K GATES 256-BGA
LFXP20E-5F484C IC FPGA 19.7KLUTS 340I/O 484-BGA
LPC11C24FBD48/301, IC MCU 32BIT 32KB FLASH 48LQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LC75700TS-MPB-E 功能描述:LCD 驅(qū)動(dòng)器 RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
LC75700TS-TLM-E 功能描述:LCD 驅(qū)動(dòng)器 RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
LC75700T-TLM-E 功能描述:接口 - 專(zhuān)用 KEY SCAN IC RoHS:否 制造商:Texas Instruments 產(chǎn)品類(lèi)型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59
LC7570E 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:Static Drivers for Vacuum Fluorescent Display for Frequency Display Applications
LC75710E 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*